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Assystem

Senior Mechanical Design Engineer

Assystem

Senior Mechanical Design Engineer at Assystem developing fluid systems and collaborating with cross-functional teams in nuclear engineering projects.

Posted 5/13/2026full-timeRemote • Derby • 🇬🇧 United KingdomSeniorWebsite

About the role

Key responsibilities & impact
  • Reporting to the Turbine Island Lead, responsible for developing fluid systems.
  • Work closely with multi-disciplined teams and the supply chain to help deliver the system design.
  • Develop 2D CAD drawings, including process flow diagrams (PFD) and process and instrumentation diagrams (P&ID).
  • Prepare 3D CAD/BIM models, plant layouts, piping design, isometrics, MTO, general arrangement drawings, detail drawings and sketches.
  • Perform layout optimisation engineering across design phases.
  • Participate in 3D model reviews, layout reviews, design reviews and technical meetings.
  • Ensure compliance with required design safety factors, tolerances, specifications, standards, codes, legislation and requirements.
  • Collaborate with multi-disciplinary engineering teams to ensure a coordinated design.
  • Maintain records of design process in accordance with sound design practices.
  • Maintain and update databases for CAD/BIM design documentation.
  • Report status and updates to management line.
  • Support team and maintain required standards and expectations.
  • Meet targets, quality, time and budget constraints.
  • Support and mediate solutions and issues with resolution with all stakeholders being aligned.
  • Ensure adherence to the company statutory H&S Policies and rules and compliance with the project and Quality.

Requirements

What you’ll need
  • Previous experience as a Mechanical Design Engineer or a similar role
  • Ability to work within the engineering team to realise designs
  • Familiarity with 2D CAD systems (AutoCAD) for drawing creation
  • Familiarity with 3D CAD/BIM systems (Revit, Inventor, Solidworks, Solid Edge, Siemens NX, PDMS, AutoCAD Plant 3D or similar) for model and drawing creation
  • Professional qualification in an engineering related field
  • SC Clearance or capable of achieving it.

Benefits

Comp & perks
  • Attractive social benefits, including an engaging Employee Committee and holiday bonuses.
  • Ongoing training with numerous career opportunities.
  • 70% of our managers are promoted internally!
  • Hybrid work: 1-2 days remote per week.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools
fluid systems development2D CAD drawingsprocess flow diagramsprocess and instrumentation diagrams3D CAD modelsplant layoutspiping designlayout optimisation engineeringdesign reviewsdesign safety factors
Soft Skills
collaborationcommunicationproblem-solvingteam supportstakeholder alignmenttime managementquality assurancebudget managementadaptabilityattention to detail
Certifications
professional qualification in engineeringSC Clearance